Is there a ready chart plotting view?
Is there a ready chart plotting view?
- Subject: Is there a ready chart plotting view?
- From: Oleg Svirgstin <email@hidden>
- Date: Fri, 28 Mar 2003 01:18:03 +0300
Hi all,
I am afraid I will have to plant it myself :(
It is an interesting and exciting little task, but the project is huge and I
am the only developer here (currently fighting both flu and my code)...
Before I do that, I want to avoid reinventing the wheel if at all possible.
I looked in many places, but unfortunately I am not quite sure what keywords
to use for search. What I found does not fit.
First what I need:
I need a more or less universal chart rendering utility, being a decent
Obj-C cell, view or control. (Most likely if I do it it will be a set of
different cells in a complex control).
It is a thing somewhat similar to NSTableView: one axis is like its rows and
the other ones are like columns. The "columns" have titles and ids (for
internal use). It is a bit more complicated thing then a table, though:
tables do not have legends, value labels and many other things.
I mean there would be a dataSource protocol for data, support for some kind
of periodic/notification driven reloads and of "static" mode, several styles
of display etc.
Probably there would be a set of delegate methods to do something special in
some situations with the data to be displayed, depending on current style.
I need dozens of these things in my big app, and while writing simple
widgets for a concrete case is usually not hard at all, I would prefer
something general (and best if written by somebody wise...)
Requirements differ from a single value "real time" display to a dozen of
series with different bases (both static and "real time").
I put real time in quotes because it is actually NOT the real real time,
some approximation - the display changes automatically as the value that we
reflect in the chart changes somewhere. With some delays quite tolerated.
The only thing I found in this direction is gnuplot, that is great etc., but
it does not look like fitting my needs. I do not need a thing that cool (2D,
3D, rotations etc), but I need it in Quartz and ready for easy integration
into a large Cocoa project. I have got too much headache with it without
extra behemoths.
Is there any Cocoa solution somewhere?
By the way, it could be a real jewel in the AppKit... How many millions
feature requests do we need to send to Apple to get it into their plans and
code? And...
Just imagine an on-screen view that contains figures and that changes its
look (ctrl-click or...) to a 2D chart, 3D chart, table again, ... Just
dreaming. And I am sure I am not the first who ever wanted this.
Thanks in advance
Regards
Oleg
PROGRAMMARE NECESSITUM EST
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